The 4.25G Fiber Optic Transceiver Modules are compatible with the Small Form Factor Pluggable Multi-Sourcing Agreement(MSA). They are compatible with Fibre Channel per FC -PI-2 Rev. 10.0. Also simultaneously compatible with Gigabit Ethernet as specified in IEEE Std 802.3. Sopto is a professional manufacturer and supplier for good quality and the cheapest 4.25G Fiber Optic Transceiver Modules Products. We have an efficient logistics that we will deliver our goods on time.